ABSTRACT
The diversity of globally distributed populations of
purple nutsedge was assessed using molecular marker data and morphological
traits. Cluster analysis of binary random amplified polymorphic DNA (RAPD) data
and morphological traits indicated that the global population of purple nutsedge
consisted of two clades. Cluster analysis of the RAPD data supported separation
of the purple nutsedge accessions evaluated into two distinct clades of 11 and
33 accessions. Except for accessions identified as California* and Arizona, all
USA accessions were clustered with accessions from Taiwan, Western Samoa, New
Zealand, Malaysia, Japan, El Salvador, Columbia, Australia, Thailand and West
Indies. A second cluster included accessions from Sudan, Greece, Iran, California*, Arizona, Brazil,
Argentina, Mauritius, Philippines, Indonesia and Tanzania. The accessions from Sudan, Greece, Iran, Mauritius, and Tanzania were
distributed along a similar longitudinal axis. Cluster analysis based on
morphological traits though not identical to that based on RAPD data also
supported separation into two clades and perhaps a third. The lack of genetic
diversity among accessions supported the hypothesis that spread and propagation
into new environments were largely by tubers which preserved genetic identity. The lack of
diversity particularly among New World and USA accessions may also reflect a
relatively recent introduction of the species into the Americas and a low level
of outcrossing.
Share and Cite:
Molin, W. , Kronfol, R. , Ray, J. , Scheffler, B. and Bryson, C. (2019) Genetic Diversity among Geographically Separated
Cyperus rotundus Accessions Based on RAPD Markers and Morphological Characteristics.
American Journal of Plant Sciences,
10, 2034-2046. doi:
10.4236/ajps.2019.1011143.